arm: dts: msm: Add device tree files for 8996v2.0 devices

Create dedicated DTS files for describing the hardware
devices found on the MSM8996v2.0 platform, and allow the
existing msm8996-v2-*.dts files to implicitly apply to
MSM8996v2.1 hardware.

Change-Id: I200f8b4b5333ebb08c81ad2be4e3c94b49556de8
Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>